论文标题
关于热修饰的非共振态不稳定性的生长
On the growth of the thermally modified non-resonant streaming instability
论文作者
论文摘要
宇宙射线非共振流不稳定性被认为是实质性磁场扩增的来源。在这项工作中，我们研究了环境等离子体温度对不稳定性的不稳定性的影响，并得出了其在炎热的，消灭相互作用的状态中其生长速率的分析表达。为了研究其非线性进化，我们为广泛的温度进行了混合PIC模拟。我们发现，在冷极限中，大约三分之二的宇宙射线漂移动能转化为磁能。升高环境血浆的温度可以大大降低饱和磁场的生长速率和大小。
The cosmic rays non-resonant streaming instability is believed to be the source of substantial magnetic field amplification. In this work we investigate the effects of the ambient plasma temperature on the instability and derive analytical expressions of its growth rate in the hot, demagnetized regime of interaction. To study its non-linear evolution we perform hybrid-PIC simulations for a wide range of temperatures. We find that in the cold limit about two-thirds of the cosmic rays drift kinetic energy is converted into magnetic energy. Increasing the temperature of the ambient plasma can substantially reduce the growth rate and the magnitude of the saturated magnetic field.
